Molding apparatus



Feb. 12, 1929.

1,702,051 H. H. C. GRONDLAHL HOLDING APPARATUS Filed Sept. 5, 1926 pf A@ Patented Feb. 12, 1929.

i vNria` stares 1,702,051 Param orrice.

HANS HENRIK CHRISTIAN GRONDAHL, OF CHICAGO, ILLINOIS, ASSIGNOR TO WEST- EBN ELECTRIC COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW YORK.

MOILDING APPARATUS.

Application tiled September 3, 1926. Serial 110,133,315.

`This invention relates to molding apparatus, and more particularly to a multi-mold metal casting apparatus. Y

|lhe object of the invention ifs to provide a moldingapparatus wherein a plurality ot articles may be molded in a single operation and in which the several parts of the apparatus may be' readily secured Vtogether or separated with a minimum expenditure oi' time and edort.

In accordance with the general features of the invention, in one embodiment thereof there is provided a framework which pivotally supports a plurality of brackets upon which are mounted a vplurality of sets of mold sectionsdesigned to contact with each other, the adjacent ones of the oppositely disposed sets contacting with a vertical intermediate plate also supported by the framework, to form slab mold chambers for receiving molten material. Quick-acting clamping means grip the mold sections tightly in operative position and quickly release them to permit the removal I ot molded articles. p

It is believed that the invention will be clearly understood from the following detailed description taken in` connection with the accompanying` drawing illustrating one embodiment of the invention, and in which Fig. 1 is a front elevation, partially broken away, of a molding apparatus embodying the invention;

Fig. 2 is a side elevation thereof;

Fig. 3 is a plan view thereof showing the several parts in operative position, and

Fig. 4 is a fragmentary plan view showing several of the parts in open position.

In the drawing `in which like numerals designate similar parts throughout the several views, the numeral 10 designates a foot plate in which are mounted standards 11 and 12 which are braced at intervals by straps 13--13 and cross bars 14-1t, which latter also formA securing means for Yfastening the framework formed by the lootl plate, standards, straps, and cross bars to a supporting member, such as a wall 15. The cross bars ift- 1d are also provided with channel-shaped members 16 midway between the standards 11 and 12 in which is mounted a vertical, forwardly extending plate 18.

Detachably and pivotally mounted on the standard 11 are brackets 20 and 21 which are tion of the associated set.

end Vwhich is designed to partially encircle the standard 11 while the bracket 2O is provided at one end with a circular aperture through which the upper end of the standard 11 is inserted. A plurality of mold sections 23-23 are pivotally mounted uponthe brackets 2O and 21 by means of arms 24-24, whicharms are of unequal lengths to permit wide separation ot the mold sections. Similar brackets 25 and 26 and mold sections 2744-27 are also mounted upon the standard 12. lThe mold sections, arms and brackets are so designed that when swung into 0perative position, as shown .in Fig. 3, the in ner mold section` ot each set contacts with the plate 18 and each of the remaining sections coacts with the mold section immediately in advance ot it to form a mold chamber.

The mold sections Vare secured in operative position by means ot quickeacting clamping devices which are pivotally mounted upon the standards 11 and 12. A plurality ot' arms 3Q-30 are pivotally secured at one end to the standard 11 and a plurality of similar arms 31-31 are pivotally mounted upon the standard 12, each of which arms is provided with a plurality of openings 33-33 in one of which is mounted a shoe 32 for engaging the outer mold sec- The outer ends of the arms 30-30 are fork-shaped and a plurality of square nuts 534-34 are pivotally mounted therein. A plurality of yokes 35i-35 areV also inserted in .the fork ends of the arms 80-30, which yokes are pro- `vided at one end with central threaded holes 36-36 into which are screwed the large portions of diiierential screws 258-38 which are provided with hand wheels 39-39,` while the small portion of the differential screws 38-38 engages the nuts get- 34e Links 40e-10 are attached at one end to the yokes 35--35 and are provided at the oppositev endswith loop portions 414-41 which are designed to overlap the torwardends of the arms 31-31, also 'fork-shaped, and which pivotally carry a plurality of hooks 1S- 43, the ends of which may be encircled by the loop portions 41-41 oit the links L10---4CL Y The operation of the apparatus is as fol-Y lows: The mold sections 23-23 and 27-27 Y are V'swung inwardly until the inner sections contact with the' plate 18 and the other sections contactwith'each other in the posi tion vshown in'Fig. 3, the arms 30u30 and 314-31 are then swung inwardly until the shoes 32-32 contact with vthe backs ofthe outer of the mold sections 28-23 and 27e-k' 27, the loop end portions"4l-'4l vofthe linksVA -4O are then swung over the hooks 43- fthe hooks 143-43 mai7 be moved forwardly' 43 and the 'latter arejforced backwardlyinto lthe positionshownin F ig. Suntil the loop end. portions 417-41 are back of the centers of rotation of the hooks '4S-43( The'li'and wheels 39-39 are then rotated inthe proper direction to turiithe diiierential screws 38#- '38 to tension the links 40-40, thereby fore`- 'ing thearmsBO-SO andrl-fl inwardly to cause theshoes 32-32 to grip the moldsections tightly in operative position. Molten material may thenbe poured into the mold lcl'iainbers formed `by the coaction ci the "mold sections andthe plate 18, and allowed `to remain untilthe` material solidifies'when until the loopend'portions41-'41 are releasedfand the links 40--40 maybe withdrawn. Thefarins 30-3O 'and' 3l-3l and the `mold sections 233-33 and .2T-'27 may then be swung outwardly in the position shown in Fig.-4 inV order that' the slabs'of solidified Vmaterial formed therein 'may be removed. f

By using a diierential screw for tightenfingitlie links, it is possible to exert a clamping4 orcetony the molds equivalent Vto' that i spacers might be' substitutedjfor 'some of' .the sections Yso that the same clamping* (50" obtainable Vwith Ya screw of very line pitch without sacrificing the strength4 inherent'iii' a screw of coarse pitch, while the Aprovision oi" separable molds kpivotally mounted on arms of unequal length'niakes it possible to separatelthemold sections widely and" to remove the molded slabs Jformed therein with a minimum of time and eli'ort. y 1 Thelabove 'described embodiment of the invention is particularly adapted for molding slabs of non-ferrous metals whichare to VVbe subsequently formed' into various shapes,

but it is to be understood that the above figures are 'illustrative onlyaiid that various modifications in the size and arrangement of Vparts may be madewithoutde'parting from the scope of the invention. VFor example,` the brackets and their supported mold sectionsmight ber replaced by other brackets supporting fewer sections, in which case,

means could be used. `The length of the lmoldgsections may be varied as desired 4with-in "theftotal length oi' thev apparatus,

andthe width of the sections may alsov be f changed if'desired, it being possible to locate the gripping shoes on the clamping arms centrally of the sectionsA byfshifting them into alignment with the proper opening in the arms. What is claimed is:

l. Inv a molding apparatus, aV framework Vincluding uprights, a vertical Vand. for# wardlyV extending plate supported by the framework, brackets pivotally mounted on the uprights, a plurality of separable mold "sections carriedby saidVV brackets designed to cooperate with saidplate and with each other to -form mold chambers, `and'quickacting mold clamping elements carried by saiduprights for securing the mold sections in operative position. i Y

' 2. In a molding apparatus, aplurality of separable fmold, sections, and quick-acting `mold clamping meanscomprising a pair of arms provided vwith shoes for engaging theouterl of the mold sections, a Vlink carried by one of the armsto connectjthe arms, and differential screw means fortensioning the Vlink to cause the shoes to grip the mold sections tightly `,in operative position.

3. Ina molding apparatus, a framework including twouprights, a-vertical 'and forwardly extending plate supported ,by the sok framework midway between the uprights, l

frameworkmidway between the"y uprights, a Y .pair o brackets pivotally mountedl on each upright, each pair of brackets pivotal/ly sup 1 porting `a plurality `of separable` mold sections designed to cooperateV with said, plateV and with eachother to forni mold chambers,

and quick-acting mold clainpingjnieans car-V ried bythe uprights comprising a pair uof varms provided with shoes for engaging Vthe outer' mold sections, a link carried by one of the arms to `connectthe arms, and diieren- Vtial screw means for tensioning thexlink'to cause Vthe Vshoesfto grip the mold section tightly in operative position.V i

5. In amolding apparatus, a'tramework, a'vertical platesupported thereby, a plurality of separable mold sections designed to Vcooperate with the fplate and with each other to form mold chambers, and quickacting mold clamping means comprising Aa pair of Y arms VpivotallyY mounted Lon 'said frame provided with shoes to engage the outer mold'sections, a'ycke carried by one of the arms, a link Vpivotally attachedv to the yoke andV provided with a looped end por# "tion to overlap theend of the 4other arm,

and diieiential screw means for tensioning of the molds, and means for positioning the s the link to cause the arms to force the shoes molds with relation to the vertical plate to 10 tightly against the mold sections to secure iorm a plurality of mold cavities. the sections in operative position. In Witness whereof, I hereunto subscribe 5 6. In a molding apparatus, a vertical my name this 13th day of August, A. D.

plate, a plurality of molds having arms of 1926.

successively increasing lengths, a movable bracket for pivotally supporting the arms HANS HENRIK CHRISTIAN GRONDAHL 

